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Of course not. Like so many desktop Java apps, it will look and feel like Java, no matter where it's running.

To be fair, it's hard to know how much of that sluggishness is the app itself and how much is just a video-encoding artefact.

Certainly the API has some interesting inclusions -- Facebook and analytics built-in.

Also note that the demo video is from the Simulator, not an actual device.

Which is probably worse - the Simulator consistently outperforms any real device.

Of course, good UI toolkits do exist for Java, but nobody just uses them. SWT and Qt both provide native UI.